 Rejoinder when told that he couldn't talk about physics, because "nobody [at this table] knows anything about it."Part 5: "The World of One Physicist", "Alfred Nobel's Other Mistake", p. 310.(Quoted in Handbook of Economic Growth (2005) by Philippe Aghion and Steven N. Durlauf.)

 Notes in a copy of Jean-Baptiste Morin's "Famous and ancient problems of the earth's motion or rest, yet to be solved" (published 1631), as quoted in The Crime of Galileo (1976) by Giorgio De Santillana, p. 167